降压型变换器的分叉及其混沌行为的研究  

Bifurcation and Chaotic Behavior of Buck Converter

作　　者：冯友宏[1] 关可[2] 陈天琴[2] 

机构地区：[1]安徽师范大学物电学院,安徽芜湖241000 [2]长安大学信息工程学院,陕西西安710064

出　　处：《现代电子技术》2007年第20期154-156,159,共4页Modern Electronics Technique

摘　　要：针对DC/DC开关变换器存在的非线性混沌现象,利用时间离散映射方法,导出了DC/DC Buck变换器的精确离散模型,研究DC/DC Buck变换器分叉和混沌现象动态演化过程。分析DC/DC Buck变换器的稳定性,最后通过仿真验证了系统的分叉和混沌行为。研究结果表明要使DC/DC Buck变换器工作于稳定状态,可以利用控制电压反馈系数的方法预防和消除分叉及混沌现象的发生。An accurate discrete model of the DC/DC switch converter is proposed, based on time discrete mapping analysis. The dynamic evolutionary process of DC/DC buck converter bifurcation and the chaos are analyzed. The stability of converter is discussed. The accuracy of system bifurcation and the chaos are verified through simulation test. The experimental results show that bifurcation and the chaos phenomenon can be prevented by adjusting the voltage feedback parameter,so that the DC --DC Buck converter can work in a steady state.

关 键 词：DC/DC BUCK变换器 离散模型 分叉 混沌 

分 类 号：TN710[电子电信—电路与系统]